Guys, a thread about a broken older model solo from ask fc got trashed. the op of the thread PM'd me so i would like to remind the thread about older solos which get stuck unable to turn on. So people with "dead" older solos can bring them back to life.
This only applies to pre-pass thru SOLOs! If you can use your stock charger while heating, this does NOT apply to you. If plugging in your charger while it's in the middle of heating resets it, then you are able to use a PA and this DOES apply to you.
This requires that you own a PA. Really anything with the proper polarity and between 7.5 and 9.5 volts that can put out at least 700mA will work. You do not need to heat an entire load off of it, you just need it to turn on and get it into PA mode, which is why most any power supply with the proper specs will work.
the SOLO is center positive so you want the - on the left side and the + on the right side.
you might have a power supply in the correct voltage range lying around at home. most likely if you do, it is 5.5x2.1mm. the solo is 4.0x1.7mm so you could get an adapter on ebay for like $2 shipped.
- Unscrew top from solo, remove top
- unscrew bottom plate
- pull out solo innards, remove battery cover
- disconnect battery, make note which way the cable is plugged into PCB, it must be correct when you plug it back in
- use your PA power supply to turn it on with no battery connected. wait for it to turn on, turn the heat up, and let it start to heat a tiny bit. you will know it is being reset because it will take about 3x as long as normal to get past the initial start up.
- it doesn't need to be heating from the PA for long at all. unplug it to shut it off.
- re-connect battery, try to turn it on with the battery and heat. if it can, re-assemble.
- if it still doesn't work, your battery might be completely dead.
it is caused by a dead battery putting out bad power and too little for the solo to deal with although it thinks the battery is okay. this causes the solo's computer to become corrupted and the memory is filled with garbage. to do a hard reset by turning it on with the PA and no battery attached is the only way you can definitely do it yourself.
if anyone has the boot loop issue on a pass thru capable solo, please let me know if this works for reviving those too.